winegstreamer: Add a skeleton MPEG layer-3 decoder filter.

dlls/winegstreamer/gst_guids.h

@@ -20,4 +20,5 @@
  */
 
 DEFINE_GUID(CLSID_decodebin_parser, 0xf9d8d64e, 0xa144, 0x47dc, 0x8e, 0xe0, 0xf5, 0x34, 0x98, 0x37, 0x2c, 0x29);
+DEFINE_GUID(CLSID_mpeg_layer3_decoder, 0x38be3000, 0xdbf4, 0x11d0, 0x86, 0x0e, 0x00, 0xa0, 0x24, 0xcf, 0xef, 0x6d);
 DEFINE_GUID(WINESUBTYPE_Gstreamer, 0xffffffff, 0x128f, 0x4dd1, 0xad, 0x22, 0xbe, 0xcf, 0xa6, 0x6c, 0xe7, 0xaa);

dlls/winegstreamer/gst_private.h

@@ -109,6 +109,7 @@ unsigned int wg_format_get_max_size(const struct wg_format *format);
 HRESULT avi_splitter_create(IUnknown *outer, IUnknown **out);
 HRESULT decodebin_parser_create(IUnknown *outer, IUnknown **out);
 HRESULT mpeg_audio_codec_create(IUnknown *outer, IUnknown **out);
+HRESULT mpeg_layer3_decoder_create(IUnknown *outer, IUnknown **out);
 HRESULT mpeg_splitter_create(IUnknown *outer, IUnknown **out);
 HRESULT wave_parser_create(IUnknown *outer, IUnknown **out);
 HRESULT wma_decoder_create(IUnknown *outer, IUnknown **out);

dlls/winegstreamer/main.c

@@ -450,6 +450,7 @@ static const IClassFactoryVtbl class_factory_vtbl =
 static struct class_factory avi_splitter_cf = {{&class_factory_vtbl}, avi_splitter_create};
 static struct class_factory decodebin_parser_cf = {{&class_factory_vtbl}, decodebin_parser_create};
 static struct class_factory mpeg_audio_codec_cf = {{&class_factory_vtbl}, mpeg_audio_codec_create};
+static struct class_factory mpeg_layer3_decoder_cf = {{&class_factory_vtbl}, mpeg_layer3_decoder_create};
 static struct class_factory mpeg_splitter_cf = {{&class_factory_vtbl}, mpeg_splitter_create};
 static struct class_factory wave_parser_cf = {{&class_factory_vtbl}, wave_parser_create};
 static struct class_factory wma_decoder_cf = {{&class_factory_vtbl}, wma_decoder_create};
@@ -476,6 +477,8 @@ HRESULT WINAPI DllGetClassObject(REFCLSID clsid, REFIID iid, void **out)
         factory = &decodebin_parser_cf;
     else if (IsEqualGUID(clsid, &CLSID_CMpegAudioCodec))
         factory = &mpeg_audio_codec_cf;
+    else if (IsEqualGUID(clsid, &CLSID_mpeg_layer3_decoder))
+        factory = &mpeg_layer3_decoder_cf;
     else if (IsEqualGUID(clsid, &CLSID_MPEG1Splitter))
         factory = &mpeg_splitter_cf;
     else if (IsEqualGUID(clsid, &CLSID_WAVEParser))

dlls/winegstreamer/quartz_transform.c

@@ -19,6 +19,7 @@
  */
 
 #include "gst_private.h"
+#include "gst_guids.h"
 
 #include "mferror.h"
 #include "mpegtype.h"
@@ -733,3 +734,48 @@ HRESULT mpeg_audio_codec_create(IUnknown *outer, IUnknown **out)
     *out = &object->filter.IUnknown_inner;
     return hr;
 }
+
+static HRESULT mpeg_layer3_decoder_sink_query_accept(struct transform *filter, const AM_MEDIA_TYPE *mt)
+{
+    return S_OK;
+}
+
+static HRESULT mpeg_layer3_decoder_source_query_accept(struct transform *filter, const AM_MEDIA_TYPE *mt)
+{
+    return S_OK;
+}
+
+static HRESULT mpeg_layer3_decoder_source_get_media_type(struct transform *filter, unsigned int index, AM_MEDIA_TYPE *mt)
+{
+    return VFW_S_NO_MORE_ITEMS;
+}
+
+static HRESULT mpeg_layer3_decoder_source_decide_buffer_size(struct transform *filter, IMemAllocator *allocator, ALLOCATOR_PROPERTIES *props)
+{
+    return S_OK;
+}
+
+static const struct transform_ops mpeg_layer3_decoder_transform_ops =
+{
+    mpeg_layer3_decoder_sink_query_accept,
+    mpeg_layer3_decoder_source_query_accept,
+    mpeg_layer3_decoder_source_get_media_type,
+    mpeg_layer3_decoder_source_decide_buffer_size,
+};
+
+HRESULT mpeg_layer3_decoder_create(IUnknown *outer, IUnknown **out)
+{
+    struct transform *object;
+    HRESULT hr;
+
+    hr = transform_create(outer, &CLSID_mpeg_layer3_decoder, &mpeg_layer3_decoder_transform_ops, &object);
+    if (FAILED(hr))
+        return hr;
+
+    wcscpy(object->sink.pin.name, L"XForm In");
+    wcscpy(object->source.pin.name, L"XForm Out");
+
+    TRACE("Created MPEG layer-3 decoder %p.\n", object);
+    *out = &object->filter.IUnknown_inner;
+    return hr;
+}

dlls/winegstreamer/winegstreamer_classes.idl

@@ -36,6 +36,13 @@ coclass AviSplitter {}
 coclass CMpegAudioCodec {}
 
 [
+    helpstring("MPEG Layer-3 Decoder"),
+    threading(both),
+    uuid(38be3000-dbf4-11d0-860e-00a024cfef6d)
+]
+coclass mpeg_layer3_decoder {}
+
+[
     helpstring("MPEG-I Stream Splitter"),
     threading(both),
     uuid(336475d0-942a-11ce-a870-00aa002feab5)